linear bearings

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Bearings housed in carriages and tables can ride on round shafts or square profile rails. Here’s a look at the advantages of each when an application demands guided linear motion.”
Engineers faced with a linear-motion application often turn to pre-engineered linear bearings and guides. But linear guides come in two basic shapes – round and square – and designers often struggle with which type to use. Square or profile rails once cost significantly more than round because the former need extensive grinding that is inherent to the design. But recent manufacturing advances and economies of scale let square rails now compete with round in a broad range of applications.


The criteria for choosing one over the other are no different than choosing any other machine component: define system objectives, then consider factors such as load capacity, stiffness, accuracy, smoothness, size, and overall costs. The best place to start is to look at the fundamental qualities of each type of guide.



Linear Ball Bearings are designed to provide a free motion in one direction. These are the most common type of linear slide, offering a smooth precision motion along a single axis linear design. Most commonly used within the furniture industry as a ball bearing drawer slide.

INA KBO20-PP linear bearings

55 mm 115
115 mm JW5549/JW5510

40 mm x 62 mm x 121,2 mm Samick LME40LUU linear bearings

2.1 mm C0-Medium
4547359583649 Ball

Samick SC12UU linear bearings

270 mm 73 mm
270 150

Samick LMHP13 linear bearings

266,7 mm NTN
187,325 190,5 mm

Samick LMFP50LUU linear bearings

30 62 mm
FBJ 62

20 mm x 32 mm x 61 mm Samick LM20LUU linear bearings

1 kg / Weight 90
3,2 mm 33 mm

Samick LMFP20UU linear bearings

ZEN 16
0,592 kN 4 mm

Samick LMEK12 linear bearings

240 mm 240
50 mm 110

Samick LMFP8L linear bearings

1,900 rpm Open
Single Row 2,300 rpm

25 mm x 40 mm x 82 mm Samick LM25L linear bearings

40 50 mm
BM4015-1 40 mm

Samick LMHP20UU linear bearings

250 310 mm
259 mm 25

Samick LMF25UU linear bearings

85 85x160x96
11,2 mm 12 mm